Measure thickness of the brake pads - AP42.10-P-4253-01GZ

MODEL 117, 164, 166, 169, 172, 176, 203, 204, 207, 209, 212, 216 (except 216.374/377/379), 218, 221 (except 221.074/077/174/177/179), 222, 230, 231, 242, 245, 246, 251 

Measurement possible at the front axle with floating caliper brake system on 

• Model 164, 169, 172, 203, 204, 207, 209, 212, 218, 245, 251

  Measurement possible at the rear axle with floating caliper brake system on 

• Model 164, 204, 207, 212, 216, 218, 221, 230, 251

  Where possible measurement to be at front axle with 6-piston and rear axle with 4-piston fixed-caliper brake system on 

• Model 204, 209, 212, 218, 230

1. Position slide (1) on the drive plate (2).

   Before each measurement position the slide (1) on the drive plate (2) in order to avoid measurement errors!

   Fig 3: Identifying Brake Pad Test Gauge Components

   Courtesy of MERCEDES-BENZ USA

   Measurement on front axle without test gauge adapter (011) on vehicles with test bores 

2. Insert measuring drift (3) in the test bore of the brake lining carrier at the outer brake pad (4).
3. Position the brake pad check gauge (010) on the brake lining carrier so that red ring (5) lies on flat.
4. Remove brake pad check gauge (010) and read off thickness of the friction lining without pad backing plate at slide (1).

Read off the value on the scale provided with the brake lining wear symbol (A) otherwise a false value will be determined!

Measurement on front axle without gauge adapter (011) on vehicles without test bores, except model 164, 251 

1. 2 Position brake pad check gauge (010) on outer brake pad (4) as shown.
2. 3 Press brake pad check gauge (010) towards the brake pad (4) until as large a part as possible of the of the red ring (5) lies on flat.

   In the process the brake pad check gauge (010) must be at right angles to the friction surface of the brake disk.

3. 4 Remove brake pad check gauge (010) and read off thickness of the friction lining without pad backing plate at slide (1).

Read off the value on the scale provided with the brake lining wear symbol (A) otherwise a false value will be determined!

Measurement on front axle with gauge adapter (011) on model 164, 251 

1. 2 Pull check gauge adapter (011) out of the bracket (012) and connect up to the end stop on the measuring drift (3).
2. 3 Mount the tip of the check gauge adapter (011) on the friction surface of the brake disk.
3. 4 Position brake pad check gauge (010) on the floating brake caliper (6) as shown so that as large a part of the red ring (5) lies on flat.

   In the process the brake pad check gauge (010) must be at right angles to the friction surface of the brake disk.

4. 5 Remove brake pad check gauge (010) and read off thickness of the friction lining without pad backing plate at slide (1).

Read off the value on the scale provided with the brake lining wear symbol (A) otherwise a false value will be determined!

Measurement on rear axle without test gauge adapter (011) on vehicles with test bores 

1. 2 Insert measuring drift (3) in the test bore of the brake lining carrier at the outer brake pad (4).
2. 3 Position the brake pad check gauge (010) on the brake lining carrier so that red ring (5) lies on flat.
3. 4 Remove brake pad check gauge (010) and read off thickness of the friction lining without pad backing plate at slide (1).

Read off the value on the scale provided with the brake lining wear symbol (A) otherwise a false value will be determined!